Same issue here with Ruby 2.0.0 ! I've tried to do some troubleshooting and went back to Ruby 1.9.3
Now, I have an other issue:
"Please install bower. (psst, run: sudo npm install -g bower) Aborting."
...and yes bower is installed and working

Same issue here with Ruby 2.0.0 ! I've tried to do some troubleshooting and went back to Ruby 1.9.3
Now, I have an other issue:
"Please install bower. (psst, run: sudo npm install -g bower) Aborting."
...and yes bower is installed and working